Document touchpad silkscreen

JohnAZoidberg · JohnAZoidberg · commit c62e977e70a1 · 2025-10-18T13:37:55.000+08:00
Signed-off-by: Daniel Schaefer &lt;dhs@frame.work&gt;
diff --git a/Electrical/Touchpad/README.md b/Electrical/Touchpad/README.md
@@ -0,0 +1,24 @@
+# Framework 16 Touchpad
+
+For the pinout, check the hubboard's pinout, documented on the main [README](../../README.md).
+
+## Silkscreen
+
+| Label | Type      | Description    |
+|-------|-----------|----------------|
+| ID    | Testpoint | Board ID       |
+| TG    | Testpoint | Ground         |
+| TI    | Testpoint | I2C Interrupt  |
+| LID   | Testpoint | Reserved       |
+| TD    | Testpoint | I2C SDA        |
+| TV    | Testpoint | 3.3V           |
+| TC    | Testpoint | I2C SCL        |
+| TB1   | Testpoint | Button         |
+| J1    | Connector | FPC Connector  |
+| U4    | IC        | Pixart PCT3854 |
+| R1    | Resistor  | Board ID 560k  |
+| R2    | Resistor  | I2C SDA Pullup |
+| R3    | Resistor  | I2C SCL Pullup |
+
+The I2C pullup resistors are unpopulated, they are present on the system side instead of the touchpad.
+If you want to use the touchpad outside of the chassis, you can populate them.
